The Milwaukee 2-9/16 in. High-Speed Steel Self-Feed Bit is perfect for drilling large holes in. Wood. The feed screw is removable and replaceable and it draws the bit into the gummiest of woods with ease. The bit is coated with a rust inhibitor. Minimum chuck size of 1/2 in. 7/16in. hex shank provides a secure gripping surface for the drill chuck Ideal for drilling large holes in all types of wood High-speed steel coated with a rust inhibitor Removable and replaceable feed screw and the cutting edges can be sharpened